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Help CenterDN200 Marine Check Valve With Lever and Weight for Vertical Pipe Installation, API 594 Compliant
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As a specialized manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our DN200 Marine Check Valve with Lever and Weight, engineered specifically for vertical pipe installations. This valve is a critical component designed to prevent reverse flow in demanding marine and offshore applications, ensuring system safety and operational integrity. Compliant with the rigorous API 594 standard, it embodies our commitment to delivering reliable, high-performance flow control solutions trusted by clients across North America, Europe, Asia, and beyond. With an annual export value reflecting our global reach, we combine robust manufacturing under our ISO9001-certified quality management system with deep technical expertise to meet the precise needs of the maritime industry.
This valve is not just a component; it is a safeguard for your piping system. Its core value lies in providing automatic, fail-safe backflow prevention in vertical lines, where gravity and fluid dynamics present unique challenges. The integrated lever and weight mechanism ensures positive, swift closure without relying on external power sources, making it ideal for shipboard seawater cooling systems, ballast lines, offshore platform piping, and other critical marine applications where reliability is non-negotiable.
Detailed Product Features & Technical Advantages:
- API 594 Compliance: Manufactured to meet the dimensional, material, and pressure-temperature rating requirements of API Standard 594 for check valves, ensuring interchangeability and reliability in industrial service.
- Lever and Weight Mechanism: The external lever and adjustable weight allow for precise calibration of the closing force. This enables the valve to be tuned for specific fluid densities and flow conditions, optimizing closure speed and minimizing water hammer.
- Vertical Installation Design: Specifically engineered for vertical (upflow) installation. The design ensures the disc swings freely and the weight assists closure directly, providing reliable operation where horizontal check valves would fail.
- Robust Construction: The valve body is typically constructed from durable materials like cast steel (WCB), ductile iron, or cast iron, selected based on service fluid and pressure class requirements. The disc and hinge mechanism are built for long-term, low-maintenance service in corrosive marine environments.
- Flanged Connections: Features standard flanged ends (e.g., ANSI B16.5) for secure, leak-free bolting to the pipeline, facilitating easier installation and maintenance compared to weld-end valves in many marine settings.
- Metal-to-Metal or Soft Seat: Standard configuration features a metal seat for high-temperature and erosive service. A resilient seat (e.g., NBR, EPDM) is available as an option for bubble-tight shut-off in lower-temperature applications.
Key Technical Specifications:
| Parameter | Specification |
| Nominal Size | DN200 (8 Inch) |
| Pressure Class | Commonly ANSI 150 & 300 (Customizable) |
| Design Standard | API 594 |
| Face-to-Face Dimensions | Per API 594 / ASME B16.10 |
| Flange Standard | ANSI B16.5, RF or FF Face (Available) |
| Temperature Range | Depends on Body/Seat Material (e.g., -29°C to 425°C for WCB) |
| Operation | Automatic (Flow Assisted), Lever & Weight Actuated |
Benefits for Your Operations:
- Enhanced System Safety: Prevents dangerous backflow, protecting pumps, compressors, and other upstream equipment from damage.
- Reduced Maintenance: Simple, robust design with fewer moving parts than complex controlled check valves, leading to lower lifetime costs.
- Operational Reliability: The lever and weight system provides consistent, predictable closing performance independent of external power, crucial for critical marine systems.
- Flexibility: The adjustable weight allows field tuning to match changing system conditions or fluid properties.
- Global Compliance: API 594 compliance facilitates procurement and ensures compatibility with international marine and industrial projects.
Frequently Asked Questions (FAQ):
-
Q: Can this valve be installed horizontally?
A: No. This specific model is engineered and optimized for vertical installation where flow is upward. The lever and weight mechanism is designed to function with gravity in this orientation. For horizontal lines, a standard swing check valve without the external lever/weight is recommended. -
Q: How is the closing force adjusted?
A: The closing force is adjusted by moving the weight along the lever arm. Moving the weight farther from the pivot point increases the closing moment, resulting in faster closure. This allows fine-tuning for different fluid velocities and densities. -
Q: What materials are available for the body and trim?
A> We offer a range of materials. Common body materials include Cast Steel (A216 WCB), Ductile Iron, and Cast Iron. Trim (disc, hinge) materials can be stainless steel or other alloys based on corrosion requirements. Exact material grades can be specified upon request. -
Q: Is the valve suitable for seawater service?
A: Yes, it is designed for marine applications. For seawater, we recommend specific material combinations such as a cast steel body with stainless steel trim (e.g., 316 SS) or other corrosion-resistant alloys to ensure long service life. -
Q: Does it come with certifications?
A> Our manufacturing facility is ISO9001 certified, ensuring a consistent quality management process. The valve is manufactured to comply with API 594 standards. Specific material test reports (MTRs) or third-party inspection certificates can be provided as an optional service. -
Q: What is the lead time for an order of DN200 valves?
A: Lead times vary based on order quantity, material selection, and current production schedule. Generally, for standard configurations, we maintain competitive lead times. Please contact our sales team with your specific requirements for an accurate delivery schedule. -
Q: Can you supply different flange standards, like DIN or JIS?
A: Yes. While ANSI flanges are standard for API 594, we can manufacture valves with DIN, JIS, or other flange standards based on customer drawings and requirements. This is a customizable option. -
Q: What maintenance does this valve require?
A> Maintenance is minimal. Periodic external inspection of the lever, weight, and hinge pin for corrosion or damage is recommended. Internally, the valve may require inspection and cleaning of the seat and disc during major system overhauls, depending on service conditions.
Shanghai Zhibang's proven track record, underscored by serving a diverse global market from North America to Oceania, and our established ISO9001 quality system, provide a solid foundation of trust. Our valves are shipped worldwide from major Chinese ports like Shanghai and Guangzhou, ensuring efficient logistics. Choosing our DN200 Marine Check Valve means selecting a product built by a dedicated manufacturer with years of focused expertise, not just a trading company. This translates into reliable performance, direct technical support, and cost-effective value for your marine and industrial projects. We invite you to contact us for a detailed quotation or to discuss how this valve can be tailored to secure your specific application.
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